301 



On Carya and Fagus, vicinity of Bloomiiigtoii. Ind. Also rei»orted ou 

 bark of Tilia and other trees. 



This species was found growing on the smooth surface of a hicliory 

 log from which the hark had been removed by man apparently one or two 

 jears previous to the finding of the specimen. The wood was slightly 

 decayed. The stroma was extensively effused in a strip which was approx- 

 imately one inch wide, entirely continuous for one foot and almost cou- 

 thiuous for three feet in length. 



This species is distinguished (in our specimens) from //. rabiyinosuin 

 by its larger and more prominent perithecia. 



4. H. ruhif/lnosiim, (Pers.) Fr. 



Sphaeria rubiginosa, Pers. 

 Hypoxylon rubiginosum, Fr. 



Stroma broadly effused, occasionally found, however, in small patches 

 a few millimeters or a few centimeters across ; rusty-red or brown, finally 

 black, sometimes with a distinct purple tint ; .75-1.5 mm. thick and adher- 

 ing closely to the substratum, the lower part consisting of the altered 

 wood so that it is sometimes difficult to distinguish between stroma and 

 substratum; at first even and sterile but finally distinctly mammillose 

 from the small (.5 nun.) perithecia which generally appear at first sepa- 

 rate in the center and spread outwardly, becoming closely packed in a 

 single layer. Asci 105-130x5-6 microns, spore-bearing part 70-80x5-6 

 microns. Spores 9-11x4.5-5.5 microns. (E. & E.— Asci, spore-bearing part 

 G0x6 microns. Spores 10x4-5 microns.) 



On decorticated Liriodendron, Borden, Ind. Also on Ulmus, Bloom- 

 ington, Ind. Reported on Acer, Quercus, Fagus and other deciduous trees. 

 Seems to be very common. 



This species is difficult to distinguish from H. atropurpureum, but has 

 smaller perithecia and slightly smaller spores. It may also be confused 

 with H. fuscopurpureum, but the latter (in our specimens) has larger 

 spores and a more elegantly purple surface. 



5. H. fuscopurpureum, (Schw.) Berk. 



Sphaeria fuscopurpurea, Schw. 



Hypoxylon fuscopui-pureum. Berk. 

 "Variously effused, margin generally sterile, outer crust rather hard, 

 black and shining within, surface elegantly purple, regularly granulose 

 from the subjacent perithecia which are oblong-ovate, polystichous, numer- 



